M. Greenwood and J. W. Brown 
481 
where x 1 is the weight of the heart in ounces, x. 2 the weight of the body in pounds, 
x 3 the weight of the kidneys in ounces. 
(3) applied to the 26 cases gave a mean error of 1 ounce. 
We accordingly conclude that the weight of the heart may be predicted from 
that of the body and kidneys with an average error of some 8 per cent, of the 
mean weight of the heart, and that the introduction of the liver does not appreciably 
improve the accuracy of the result. This equation may be of use occasionally in 
the post mortem room ; rough as it is, we do not think any better formula has been 
found by the anatomist. 
We finally come to the results yielded by the whole of the data sent us which 
fell between the required limits of age. 
The necessary constants are set out in Tables IV and VA and B and these 
should be compared with Tables II and III. It will be seen at once that, 
TABLE IV. 
Constants calculated from All new Data. Males (25 — 55). 
Variable 
Mean 
Standard Deviation 
Coefiicient of 
Variation 
Heart ... 
12-15+ -18 ozs. 
2-700 
22-22 
Body- weight ... 
128-89 ±1-64 lbs. 
24-367 
18-91 
Kidneys 
10-77+ -15 ozs. 
2-267 
21-05 
Liver ... 
57-11 ± -81 „ 
1 1 -890 
20-82 
Age 
42-60 + -60 yrs. 
8-844 
20-76 
Brain ... 
49-10+ -30 ozs. 
4-464 
9-09 
TABLE VA. 
Total Correlations. All new Data. Males (25 — 55). 
Heart 
Body-weight 
Kidney 
Liver 
Brain 
Age 
Heart 
Body- weight... 
Kidney 
Liver 
Brain 
Age 
1 
•56 +-05 
•53+ -05 
•46 +-05 
■09 + -07 
•06+ -07 
•56 ±-05 
1 
•40 +-06 
•57+ '05 
•24+ -07 
- -04 + -07 
■53 + -05 
■40+ -06 
1 
•32 + -06 
•10 +-07 
•04 + -07 
•46 +-05 
•57+ -05 
•32+ -06 
1 
•14+ -07 
-•11+ -07 
•09 + -07 
■24 +-07 
■10+ -07 
•14+ -07 
1 
- -08 + -07 
•06+ -07 
- -04 ± -07 
•04 + -07 
- -11 + -07 
- -08 + -07 
1 
TABLE VB. 
Partial Correlations. 
Variables 
Constants 
Correlation 
Heart and Body-weight 
Kidneys 
•45 + -05 
Heart and Kidneys 
Body-weight 
•40+ -06 
Kidneys and Body-weight 
Heart 
■15 ±-07 
